217945840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{389189}}^1$

素因数の和:389209

約数の個数: 40

約数和(自身を含む): 579114720

約数和(自身を除く): 361168880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 389189, 778378, 1556756, 1945945, 2724323, 3113512, 3891890, 5448646, 6227024, 7783780, 10897292, 13621615, 15567560, 21794584, 27243230, 31135120, 43589168, 54486460, 108972920, 217945840]

約数ペア:

[(1, 217945840), (2, 108972920), (4, 54486460), (5, 43589168), (7, 31135120), (8, 27243230), (10, 21794584), (14, 15567560), (16, 13621615), (20, 10897292), (28, 7783780), (35, 6227024), (40, 5448646), (56, 3891890), (70, 3113512), (80, 2724323), (112, 1945945), (140, 1556756), (280, 778378), (560, 389189)]